Wheel equipped with disk brake



Feb. 2, 1954 R. LuclEN 2,667,947

l WHEEL EQUIPPED WITH DISK BRAKE Filed Jan. s, 1951 2 sheets-sneer 1' /N VENTDR RENLUclEN Feb. 2, 1954 R. LuclEN WHEEL EQUIPPED WITH DISK BRKE 2 Sheets-Sheet 2 Filed Jan, 3, 1951 l l INVENToR REN@ LUIEN BI? IVIVTpA.,

AGENT-5 `braking eie'ct is secured by Patented Feb. 2, 1954 Ren Lucien,

Switzerland Paris, France, assigner to Societe dlnventions Aeronautiques et Mecanques` S. I.

A. M., Geneva, Switzerland, a corporation of Application January 3, 1951, Serial No. 204,198 Claims priority, application France June A'7, 1950 2 Claims.

My invention relates to such wheels as are equipped with so-called disc brakes and more particularly to wheels of the said kind in which the a squeezing action exerted upon one or several discs rotationally rigid with the movable portion of the wheel by means of one or several axially movable brake shoes or segments cooperating with a greater or less, anyhow limited portion of the discs.

One is aware that generally in disc brakes the advantage of such an arrangement is that owing to most of the disc surfaces being exposed to the atmosphere the heat accumulated in said discs during the braking process and by which they may sometimes be brought to red heat can be dissipated rapidly by radiation as well as by conduction.

The purpose of my invention is to remove that portion of the wheel in which the bearing is housed and by the way the lubricant providing for a satisfactory working of the bearing from the inuence of the heat thus radiated by the discs.

My invention is characterized thereby that the fixed portion of the brake, i. e. the one which carries and guides the brake segments, comprises a barrel providing a heat shield surrounding the housing of the antiiriction bearing and keeping the latter together with the lubricant safe from the detrimental action of the radiant heat consequent to the braking process.

In a particular embodiment of my invention given by way of example, the said shield is rigid on its one side with a iange to which a plate is secured which carries the brake-actuating means (generally liquid-operated pistons working in cylinders) and on its opposite side with plates against which the whole segment and disc system is pressed during the braking process and by which said actuating means are backed in their respective actions.

A disc brake embodying the features of my invention is illustrated in perspective view in the sheets of drawings appended hereto, in which- Figures 1 and 2 respectively show the iixed section of the brake without its segmental linings and the brake section which carries the liquidoperated actuating members.

Figure 3 is a partly sectional perspective view of my disc brake as mounted on a wheel.

Figure 4 illustrates the wear take-up device.

Shown in the various figures of the drawings are the well known parts of every wheel of the kind considered, i. e. the rotatable section which comprises on the one hand the wheel body which (Cl. 18S-152) here is composed of a pair of unequal annular shells I, 2, made e. g. of any suitable light alloy and provided with hub portions rigid with the outer races of antifriction bearings in which an axle (not shown) is journaled and on the other hand brake discs 3, 3 which are made peripherally rigid with the aid of peripheral notches 4, 4 milled therein and cooperating with stop bars 5 tted in said shells I, 2. In the braking process the said discs cooperate with paired braking segments 6a, 6b, 6c which are provided with friction linings 1 vigorously pressed into contact with the discs during the braking process.

According to the main feature of my invention the iixed section of the brake is formed with a sleeve 3 which completely surrounds the antifriction bearings and by which consequently the same are shielded together with the accompanying lubricant against the heat radiated by the braking disc-and-segment system.

The said shield sleeve is provided at its one end with a flange 9 to which a plate II) is secured which carries the brake-actuating means (here a pair of hydraulic power relays II, I2) and at its other end with a pair of back brake lining supports I3, I4 located each opposite one of said power relays.

The back segmental brake linings 6a are rigid with the said supports I3, I4 while the intermediate brake lining segments 6b and the front brake lining segments 6c are guided in their axial displacements on fixed bars I5 by which they are retained from partaking of the rotation during the braking process.

Each hydraulic power relay comprises a fixed cylinder in which a piston I' or I8 is slidably received upon the front end face of which the pressure of a liquid, supplied through a duct I9, is exerted while the back end oi said piston is rigid with an equalizer plate 20 through which the hydraulic pressure is transmitted from the piston to the front segment 6c and the pack of brake discs and linings behind the same.

As shown in Fig. 4, each power relay I'I, I8 is equipped with brake-releasing means which consist of a sleeve 2i slidably mounted on and coaxial with the related piston, which sleeve is formed at its front end with a ange 22 which provides a rest for a spring 23 coiled about said sleeve.

As the brake is applied by letting in pressure liquid through the duct I9 the sleeve 2l which is forced backwards together with the related brake-actuating piston will compress the said spring 23. As the pressure is released in order 1. A vehicle wheel having a brake of the disc type comprising: a rotatable wheel body, aseries cylinder in response to the supply of uid under pressure to the interior of the cylinder; and a brake backing plate rigidly secured to the other end of the sleeve in alignment with the power 5f Lrelay xand having a brakeylfui'ingthexeonf; the pis- :aitorf bengxeduat itsgziend -o ppo'sitethe closed end of the cylinder to the adjacent one of the Vnanon-rotatable brake shoes.

2. A vehicle wheel as in claim 1 comprising of annular friction discs rotatable iunitarilywitlr'fni: aCpluralityfbgroups of brake shoes distributed the wheel body and axiallynnovablelrelatively thereto; at least one groupspfnznonerotatable brake shoes having brake i-,linivngstfandffbeinggfarranged alternately with the discs and each engaging a relatively reducedarea of-thediscs;a

stationary brake structurepomprising a"c'ylin drical sleeve co-axial Withzzthefbearpgs.'mfithe wheel and positioned between the discs and shoes and the bearings and surrounding the "latter throughout the axial length thereof; a flange extending: radially; ifromi thea sleeves-.fat` onel "Lend whereof; a; supportmlate securedftofthe ange; 1. a. brake-actuatingv power: relay-'mounted onfthe support plategin axialfalignment Witlithegroup of brake lfshoesta'ndeomprising: avoylinderlhaving va Aclosed endy `and..i a piston;2slidable=` inffthe .'circumferentiallyraround the Wheel body, each ...ha'v1 1gf,a,:supp-ort3y plate, a power relay and a tyqbackfing4 :plate in alignment therewith.

REN LUCIEN.

"Reference'Citd in the le of this patent f'fUNIlEDffSTATES PATENTS 

